body {
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    margin: 0;
    padding: 0;
}

.container {
    width: 700px;
    margin: 30px auto;
    background: #fff;
    padding: 2em;
    box-shadow: 0 0 12px #999;
    border-radius: 8px;
}

form label {
    display: block;
    margin: 8px 0;
}

#output {
    margin-top: 2em;
}

canvas {
    border: 1px solid #aaa;
    margin-bottom: 1em;
    background: #eee;
}

#species-config label {
    display: block;
    margin: 4px 0 4px 10px;
}